In an Instagram post that didn't name Minaj at 12:14 a.m., Cardi B wrote that she has “let a lot of shit slide!”

“I let you sneak diss me, I let you lie on me, I let you attempt to stop my bags, fuck up the way I eat! You’ve threaten other artists in the industry, told them if they work with me you’ll stop fuckin with them!!”

She added: “I addressed you once in person, I addressed you a second time in person, and every time you copped the plea!”

A witness who declined to be named because they were not authorized to speak publicly told the Associated Press that Minaj was talking to someone when Cardi B tried to attack her, but security guards intervened.

As Cardi B was escorted out of the venue, a welt on her forehead was clearly visible.

Charles Sykes / AP

Cardi B, with a bump on her forehead, leaves after an altercation at the Harper's Bazaar party at the Plaza Hotel on Sept. 7 in New York.

Cardi B and Minaj have been two of the more prolific rap artists in the past year, apparently sparking a rivalry. Cardi B, who also noted criticism of her mothering skills in her Instagram post, recently had her first child with rapper Offset.

Outlets, including TMZ, reported that Cardi B allegedly threw one of her high-heeled shoes at Minaj during the altercation.

After news of the incident broke, Late-Night Twitter was obviously here for it.